The pics are a little too dark to really tell for sure, but I think that Ed hit it right.
(1) the right hand side of the tang sight looks good. Nice and flat with sharp serial number.
(2) the left most part of the British marks under the barrel look like they have been buffed
(3) the inside of the right rabbit ears look like there is a depression there that would suggest that that area has been buffed.
(4) the right hand proof marks COULD BE ok.
These are just possibilities. Hard to really tell without the pictures being made lighter. MORE and better pictures are necessary. So don't hold my feet to the fire.
The gun could have been spot redone.
Big Norm
